Opener head vibrates excessively and mounting brackets rattle.

Safety first: Disconnect power and use a stable ladder when working overhead.

Steps:

• Tighten brackets: Check all Henderson opener mounting brackets and lag screws into the ceiling joists. Tighten or replace with longer fasteners if loose.
• Add bracing: Install additional angle iron bracing if the opener is mounted on thin or flexible supports.
• Inspect motor mounts: Replace worn rubber motor mounts or vibration isolators if present.
• Check door balance: An unbalanced door can overload the opener and increase vibration; have springs adjusted if needed.